[go: up one dir, main page]

US6973337B2 - Apparatus for the mobile communication device in low power consumption using LDO regulator with sleep mode - Google Patents

Apparatus for the mobile communication device in low power consumption using LDO regulator with sleep mode Download PDF

Info

Publication number
US6973337B2
US6973337B2 US10/225,748 US22574802A US6973337B2 US 6973337 B2 US6973337 B2 US 6973337B2 US 22574802 A US22574802 A US 22574802A US 6973337 B2 US6973337 B2 US 6973337B2
Authority
US
United States
Prior art keywords
amplifier
sleep
mobile communication
communication device
voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime, expires
Application number
US10/225,748
Other languages
English (en)
Other versions
US20030211870A1 (en
Inventor
Jean-Christophe Jiguet
Lorenzo Indiani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Texas Instruments Inc
Original Assignee
Texas Instruments Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Texas Instruments Inc filed Critical Texas Instruments Inc
Assigned to TEXAS INSTRUMENTS INCORPORATED reassignment TEXAS INSTRUMENTS INCORPORATED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: INDIANI, LORENZO, JIGUET, JEAN-CHRISTOPHE
Publication of US20030211870A1 publication Critical patent/US20030211870A1/en
Priority to US11/062,031 priority Critical patent/US20050143045A1/en
Application granted granted Critical
Publication of US6973337B2 publication Critical patent/US6973337B2/en
Adjusted expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current 
    • G05F1/46—Regulating voltage or current  wherein the variable actually regulated by the final control device is DC
    • G05F1/56—Regulating voltage or current  wherein the variable actually regulated by the final control device is DC using semiconductor devices in series with the load as final control devices
    • G05F1/565—Regulating voltage or current  wherein the variable actually regulated by the final control device is DC using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor

Definitions

  • This invention relates in general to communications and, more particularly, to a mobile communications device with low power consumption.
  • Mobile communication devices have become a primary source of communication.
  • mobile phones now account for a large percentage of the number of phones sold around the world.
  • paging mode A major distinguishing factor between various mobile phones concerns battery life and, specifically, standby time. Even when a mobile phone is not involved in voice communications, its circuitry is powered to allow background communications with the base stations, known as “paging mode”. During periods of inactivity, paging mode occurs infrequently, about 10% of the time with the remainder of the time being a “deep sleep” mode in which most of the system circuitry is disabled or placed in a suspended state. In deep sleep mode, typical systems stop the high frequency clock to reduce dynamic consumption and set unused circuitry blocks in powerdown.
  • the LDO (low drop-out) regulators are kept in an ON state in order to maintain context and data (some LDOs that are not used for context or data retention may be placed in an OFF state). Maintaining the analog portion in an active state can significantly drain current from the battery during standby, since the active LDOs exhibit full quiescent current consumption. Further, LDOs in an OFF state have a slow transition time to the ON state, compared to GSM requirements.
  • a mobile communication device comprises digital baseband circuitry, radio frequency modulation circuitry, and power circuitry for powering said digital baseband circuitry and said radio frequency modulation circuitry.
  • the power circuitry includes one or more regulators including a first voltage reference, a second voltage reference with a significantly lower current consumption than the first voltage reference, a bias current supply, a first amplifier, a second amplifier which consumes less bias current consumption than the first amplifier, and sleep logic.
  • the sleep logic couples the first voltage reference to the first amplifier and the bias current supply to the first amplifier in a normal mode and couples the second voltage reference to the second amplifier and the bias current supply to the second amplifier in a sleep mode.
  • the present invention provides significant advantages over the prior art. First, there is a drastic reduction of current consumption during periods in which there is no need for maximum rated current or high precision on load and line regulation. Second, the only a small addition of circuitry is necessary to implement the sleep mode in the regulators.
  • FIG. 1 illustrates a schematic of a prior art LDO circuit
  • FIG. 2 illustrates a schematic of an LDO with a low current consumption (sleep) state
  • FIG. 3 illustrates a general block diagram of a mobile phone using the LDOs of FIG. 2 .
  • FIGS. 1–3 of the drawings like numerals being used for like elements of the various drawings.
  • FIG. 1 illustrates a block diagram of a prior art LDO (low dropout regulator).
  • LDOs are a special type of regulator where the minimum voltage required between the input and the output (the dropout voltage) is particularly low. This allows a battery to continue to power the LDO almost until the battery voltage drops to the level of the desired output. LDOs are thus used to provide a stable voltage source for the other circuitry in the mobile communication devices, such as the processors (general purpose and digital signal processors), memory, input/output, and other peripherals.
  • the processors general purpose and digital signal processors
  • memory input/output
  • input/output input/output
  • a bandgap voltage source 12 provides a reference voltage (VREF) to, the input of amplifier 16 .
  • Supply voltage (VCC) is coupled to the bandgap voltage source 12 .
  • a bias current source 14 provides current to amplifier 16 .
  • the output of amplifier 16 is coupled to the gate of p-channel regulator pass-transistor 18 .
  • Pass transistor 18 has a first source/drain coupled to node VIN and a second source/drain coupled to node VOUT.
  • Two resistors 20 and 22 are series coupled between VOUT and ground to divide the voltage to a desired level. The node between the two resistors is fed back to amplifier 16 .
  • a capacitor 24 (shown in FIG. 1 as a 10 ⁇ F capacitor) is coupled between VOUT and ground for output voltage stability.
  • a capacitor 26 is coupled between VREF and ground for filtering.
  • the control voltage produced by amplifier 16 imposes a working point to pass transistor 18 , resulting in a stable output voltage at K*VREF, where K is set by the voltage divider resistors 20 and 22 .
  • Bandgap voltage source 10 is designed to output a precise VREF despite temperature, process variations, and VCC supply spread. Depending upon the expected current drive capability and voltage regulation quality, amplifier 16 can be relatively large and consume an extremely high level of current.
  • LDOs 10 Mobile communications devices, such as GSM mobile phones, use several LDOs 10 to supply all the electronic devices in the phone.
  • Embedded LDOs have two states: ON or OFF. In the OFF state, there is very low quiescent current consumption, but also no current drive available. In the ON state, there is full quiescent current consumption, but the maximum output rated current is available.
  • IBIAS error amplifier bias current
  • IBG reference voltage generator current
  • IGBK error amplifier feedback divider circuit
  • the various circuitry powered by the LDOs will be in an idle state up to 90% of the time.
  • deep sleep When the mobile phone is in a mode referred to as “deep sleep”, there is no CPU activity and most of the mobile phone's functions are in an idle state. In this idle state, most of the current sink from the battery is not used for mobile phone activities, but is lost in the LDO's biasing current. Accordingly, the current consumption of the LDO during the idle states has a significant effect on battery life.
  • FIG. 2 illustrates an embodiment of an LDO 30 that can greatly reduce the amount of current consumed during the deep sleep states.
  • reference numerals from FIG. 1 are used to illustrate similar parts for a given LDO design.
  • LDO 30 uses both a main bandgap voltage source 12 and a sleep bandgap voltage source 32 , both coupled to VCC.
  • the main bandgap voltage is coupled to an input of error amplifier 16 through switch 34 and the sleep bandgap voltage source is coupled to an input of error amplifier 36 through switch 38 .
  • Switches 34 and 38 are controlled by sleep logic 40 such that there states are complementary (as indicated by inverter 42 ): when switch 34 is closed, switch 38 is open and vice-versa.
  • bias current source 14 is coupled to amplifier 16 through switch 44 and to amplifier 36 through switch 46 .
  • Sleep logic controls switches 44 and 46 such that there states a complementary as well, as indicated by inverter 48 . Further, switches 34 and 44 always maintain the same state and switches 38 and 46 always maintain the same state.
  • the outputs of both amplifier 16 and 36 are both coupled to the gate of pass transistor 18 .
  • the divided voltage node between resistors 20 and 22 is coupled to the inputs of both amplifiers 16 and 36 .
  • Sleep logic 40 is also coupled to main bandgap voltage source 12 to either enable or disable its operation.
  • the sleep bandgap voltage source 32 is a simple design without temperature or process compensation to consume less than 5 ⁇ A, wherein the main bandgap voltage source 12 of the type typically used in a precision LDO application consumes about 100 ⁇ A due to a more complex design. The important factor is that the sleep bandgap voltage source consumes significantly less current during operation.
  • the sleep error amplifier 36 is significantly smaller than the main error amplifier 16 .
  • the smaller amplifier 36 is less precise than the larger amplifier 16 , but also consumes less bias current.
  • the smaller amplifier 36 need only provide sufficient current to power the digital and RF circuitry during deep sleep state, i.e., the leakage current for the processors, DSPs and memories.
  • Amplifier 36 also maintains the voltage on the VOUT output across capacitor 24 .
  • the main bandgap voltage source 12 is coupled to the main error amplifier 16 through switch 34 and the bias current source 14 is coupled to the amplifier 16 through switch 44 . Accordingly, sleep bandgap voltage source 32 is de-coupled from error amplifier 36 and bias current source 14 is decoupled from error amplifier 36 .
  • the operation of this circuit during normal and paging mode is almost the same as that shown in FIG. 1 .
  • bandgap voltage source 12 is de-coupled to the main error amplifier 16 by switch 34 and the bias current source 14 is de-coupled to the amplifier 16 by switch 44 .
  • Sleep bandgap voltage source 32 is coupled to error amplifier 36 by switch 38 and bias current source 14 is coupled to error amplifier 36 by switch 46 .
  • the sleep error amplifier 36 drives the pass-transistor 18 instead of main amplifier 16 .
  • the sleep bandgap voltage source 32 sets the reference voltage VREF and main bandgap voltage source 12 is disabled to eliminate its current consumption. Since both the sleep bandgap voltage source 32 and the sleep error amplifier 16 consume significantly less current than their normal/paging mode counterparts, the current consumed by each LDO in deep sleep mode is greatly reduced. Since there may be several LDOs used to supply voltage to other circuits in the system, the overall current consumption during deep sleep mode can be significant.
  • Capacitor 24 remains charged by the sleep error amplifier 36 during deep sleep mode and capacitor 26 remains charged by the sleep bandgap reference 32 . Therefore, transitions from deep sleep mode to a full ON state are fast relative to a typical LDO in an OFF state, because of the charged states of capacitors 24 and 26 .
  • the LDO 30 provides significant advantage over the prior art. As discussed above, there is a drastic reduction of LDO current consumption during periods in which there is no need for maximum rated current or high precision on load and line regulation. Second, the only additional circuitry necessary to implement the circuit of FIG. 2 relative to the circuit of FIG. 1 is the small amplifier 36 and the sleep bandgap 32 . These circuits have a relatively small impact, since larger parts, the resistors 20 and 22 and the pass transistor 18 are shared between the normal operation and sleep components. Third, the LDO 30 combines low current consumption in sleep mode with fast transition to active mode. This makes the LDO adaptable to many applications with consumption and real-time constraints, such as mobile applications and specifically GSM applications.
  • FIG. 3 illustrates a generalized block diagram showing the LDOs 30 used in a mobile phone application.
  • the mobile phone 50 includes an analog baseband chip 52 , a digital baseband chip 54 and an RF chip 56 .
  • the RF chip 56 includes the modulation and demodulation circuitry and the GSM interface (for a GSM device).
  • the digital baseband chip includes one or more multipurpose processors 58 , one or more DSPs 60 , a memory interface 62 , GSM peripherals 64 and general-purpose peripherals 66 .
  • the analog baseband chip 52 includes a power management and LDO circuitry 69 , including a plurality of LDOs 30 powered by battery 70 and sleep logic 40 (see FIG. 2 ).
  • the analog baseband chip 52 further includes a GSM interface 72 coupled to the GSM peripherals 64 , a general purpose interface 74 coupled to the general purpose peripherals 66 , and audio interface 76 coupled to the DSP 60 , a baseband codec 78 coupled to the RF chip 56 , and RF auxiliary circuit 79 coupled to the RF chip 56 , and audio circuit 80 coupled to the ear speaker and microphone, and an auxiliary circuit 82 coupled to other external devices, such as LEDs.
  • GSM interface 72 coupled to the GSM peripherals 64
  • a general purpose interface 74 coupled to the general purpose peripherals 66
  • audio interface 76 coupled to the DSP 60
  • baseband codec 78 coupled to the RF chip 56
  • RF auxiliary circuit 79 coupled to the RF chip 56
  • audio circuit 80 coupled to the ear speaker and microphone
  • an auxiliary circuit 82 coupled to other external devices, such as LEDs.
  • While the mobile communication device 50 is shown as three distinct chips in FIG. 3 , improved fabrication techniques may allow functions of the various chips to be integrated in a single chip.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Amplifiers (AREA)
  • Continuous-Control Power Sources That Use Transistors (AREA)
  • Transceivers (AREA)
  • Mobile Radio Communication Systems (AREA)
US10/225,748 2002-05-10 2002-08-22 Apparatus for the mobile communication device in low power consumption using LDO regulator with sleep mode Expired - Lifetime US6973337B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/062,031 US20050143045A1 (en) 2002-05-10 2005-02-18 LDO regulator with sleep mode

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP02076853A EP1361664B1 (fr) 2002-05-10 2002-05-10 LDO régulateur avec un mode de sommeil
EP02076853.7 2002-05-10

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US11/062,031 Division US20050143045A1 (en) 2002-05-10 2005-02-18 LDO regulator with sleep mode

Publications (2)

Publication Number Publication Date
US20030211870A1 US20030211870A1 (en) 2003-11-13
US6973337B2 true US6973337B2 (en) 2005-12-06

Family

ID=29225708

Family Applications (2)

Application Number Title Priority Date Filing Date
US10/225,748 Expired - Lifetime US6973337B2 (en) 2002-05-10 2002-08-22 Apparatus for the mobile communication device in low power consumption using LDO regulator with sleep mode
US11/062,031 Abandoned US20050143045A1 (en) 2002-05-10 2005-02-18 LDO regulator with sleep mode

Family Applications After (1)

Application Number Title Priority Date Filing Date
US11/062,031 Abandoned US20050143045A1 (en) 2002-05-10 2005-02-18 LDO regulator with sleep mode

Country Status (3)

Country Link
US (2) US6973337B2 (fr)
EP (1) EP1361664B1 (fr)
DE (1) DE60228051D1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060063555A1 (en) * 2004-09-23 2006-03-23 Matthew Robbins Device, system and method of pre-defined power regulation scheme
US20080003950A1 (en) * 2006-06-30 2008-01-03 Nokia Corporation Controlling switching mode power supply of power amplifier
US20080016379A1 (en) * 2006-07-13 2008-01-17 Nijhawam Vijay B System for Retaining Power Management Settings Across Sleep States
US20080119226A1 (en) * 2006-11-21 2008-05-22 Samsung Electronics Co. Ltd. Apparatus for controlling power consumption in pda phone
US20100079201A1 (en) * 2008-09-30 2010-04-01 Agneta Bengtsson Automated sleep sequence
WO2011075308A1 (fr) * 2009-12-18 2011-06-23 Trueposition, Inc. Récepteur de positionnement par satellite et système de localisation de serveur mandataire
US8026703B1 (en) * 2006-12-08 2011-09-27 Cypress Semiconductor Corporation Voltage regulator and method having reduced wakeup-time and increased power efficiency
US8072196B1 (en) 2008-01-15 2011-12-06 National Semiconductor Corporation System and method for providing a dynamically configured low drop out regulator with zero quiescent current and fast transient response
US8258942B1 (en) 2008-01-24 2012-09-04 Cellular Tracking Technologies, LLC Lightweight portable tracking device
US20130201735A1 (en) * 2010-09-03 2013-08-08 Hendon Semiconductors Pty Ltd Ac-dc converter with adaptive current supply minimising power consumption

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7992088B2 (en) * 2002-03-12 2011-08-02 International Business Machines Corporation Method and system for copy and paste technology for stylesheet editing
DE60228051D1 (de) 2002-05-10 2008-09-18 Texas Instruments Inc LDO Regler mit Schlafmodus
KR20040006786A (ko) * 2002-07-15 2004-01-24 삼성전자주식회사 컴퓨터의 네트워크접속시스템 및 그 제어방법
US7184799B1 (en) * 2003-05-14 2007-02-27 Marvell International Ltd. Method and apparatus for reducing wake up time of a powered down device
GB0324292D0 (en) * 2003-10-17 2003-11-19 Huggins Mark Embedded power supplies particularly for large scale integrated circuits
DE102004041920B4 (de) * 2004-08-30 2012-12-06 Infineon Technologies Ag Spannungsversorgungsschaltung und Verfahren zur Inbetriebnahme einer Schaltungsanordnung
US7253594B2 (en) * 2005-01-19 2007-08-07 Texas Instruments Incorporated Reducing power/area requirements to support sleep mode operation when regulators are turned off
KR100706239B1 (ko) * 2005-01-28 2007-04-11 삼성전자주식회사 대기모드에서 소비 전력을 감소시킬 수 있는 전압레귤레이터
TWI298829B (en) * 2005-06-17 2008-07-11 Ite Tech Inc Bandgap reference circuit
US7557550B2 (en) 2005-06-30 2009-07-07 Silicon Laboratories Inc. Supply regulator using an output voltage and a stored energy source to generate a reference signal
JP2007043444A (ja) * 2005-08-03 2007-02-15 Matsushita Electric Ind Co Ltd 半導体集積回路
KR100736748B1 (ko) 2005-09-14 2007-07-09 삼성전자주식회사 컴퓨터 및 그 제어방법
TW200744284A (en) * 2006-05-24 2007-12-01 Asustek Comp Inc Voltage regulating circuit with over-current protection
CN100533327C (zh) * 2006-05-29 2009-08-26 华硕电脑股份有限公司 具有过电流保护的电压调节电路
KR100996186B1 (ko) * 2008-11-06 2010-11-24 주식회사 하이닉스반도체 내부 전압 생성회로
JP5241523B2 (ja) * 2009-01-08 2013-07-17 ルネサスエレクトロニクス株式会社 基準電圧生成回路
US8477631B2 (en) * 2009-08-25 2013-07-02 Texas Instruments Incorporated Dynamic low power radio modes
JP5792477B2 (ja) * 2011-02-08 2015-10-14 アルプス電気株式会社 定電圧回路
US9134742B2 (en) * 2012-05-04 2015-09-15 Macronix International Co., Ltd. Voltage regulator and voltage regulation method
WO2016202398A1 (fr) 2015-06-18 2016-12-22 Epcos Ag Appareil régulateur de tension à faible relâchement
US9817415B2 (en) * 2015-07-15 2017-11-14 Qualcomm Incorporated Wide voltage range low drop-out regulators
US10795391B2 (en) * 2015-09-04 2020-10-06 Texas Instruments Incorporated Voltage regulator wake-up
TWI570534B (zh) * 2015-11-18 2017-02-11 世界先進積體電路股份有限公司 穩壓電路
US9733655B2 (en) 2016-01-07 2017-08-15 Vanguard International Semiconductor Corporation Low dropout regulators with fast response speed for mode switching
US10838446B2 (en) * 2016-02-29 2020-11-17 Skyworks Solutions, Inc. Low leakage current switch controller
GB2557276A (en) 2016-12-02 2018-06-20 Nordic Semiconductor Asa Voltage regulators
CN106886241A (zh) * 2017-03-29 2017-06-23 北京松果电子有限公司 低压差线性稳压器及其工作模式切换方法
JP6951305B2 (ja) * 2018-08-24 2021-10-20 株式会社東芝 定電圧回路
US10797579B2 (en) * 2018-11-02 2020-10-06 Texas Instruments Incorporated Dual supply low-side gate driver
KR102428555B1 (ko) * 2020-06-16 2022-08-04 어보브반도체 주식회사 전자 기기의 고속 웨이크-업을 위한 직류-직류 변환 장치 및 그 동작 방법
CN113359918B (zh) * 2021-06-01 2022-07-01 深圳市时代速信科技有限公司 一种可输出低噪声和高psrr的ldo电路

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0686903A2 (fr) 1994-06-10 1995-12-13 Nokia Mobile Phones Ltd. Méthode pour reduire la consommation d'un dispositif électrique avec régulateur de tension
US6031362A (en) * 1999-05-13 2000-02-29 Bradley; Larry D. Method and apparatus for feedback control of switch mode power supply output to linear regulators
US6236194B1 (en) * 1999-08-06 2001-05-22 Ricoh Company, Ltd. Constant voltage power supply with normal and standby modes
US6441591B2 (en) * 2000-03-17 2002-08-27 Nokia Mobile Phones Ltd. Linear regulator with conditional switched mode preregulation
EP1361664A1 (fr) 2002-05-10 2003-11-12 Texas Instruments Incorporated Ldo regulateur avec un mode de sommeil
US6677735B2 (en) * 2001-12-18 2004-01-13 Texas Instruments Incorporated Low drop-out voltage regulator having split power device
US6806690B2 (en) * 2001-12-18 2004-10-19 Texas Instruments Incorporated Ultra-low quiescent current low dropout (LDO) voltage regulator with dynamic bias and bandwidth

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU739217C (en) * 1997-06-11 2002-06-06 Nec Corporation Adaptive filter, step size control method thereof, and record medium therefor
US6097225A (en) * 1998-07-14 2000-08-01 National Semiconductor Corporation Mixed signal circuit with analog circuits producing valid reference signals
US7191351B2 (en) * 2001-09-12 2007-03-13 Rockwell Automation Technologies, Inc. Method and network for providing backup power to networked devices

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0686903A2 (fr) 1994-06-10 1995-12-13 Nokia Mobile Phones Ltd. Méthode pour reduire la consommation d'un dispositif électrique avec régulateur de tension
US6031362A (en) * 1999-05-13 2000-02-29 Bradley; Larry D. Method and apparatus for feedback control of switch mode power supply output to linear regulators
US6236194B1 (en) * 1999-08-06 2001-05-22 Ricoh Company, Ltd. Constant voltage power supply with normal and standby modes
US6441591B2 (en) * 2000-03-17 2002-08-27 Nokia Mobile Phones Ltd. Linear regulator with conditional switched mode preregulation
US6677735B2 (en) * 2001-12-18 2004-01-13 Texas Instruments Incorporated Low drop-out voltage regulator having split power device
US6806690B2 (en) * 2001-12-18 2004-10-19 Texas Instruments Incorporated Ultra-low quiescent current low dropout (LDO) voltage regulator with dynamic bias and bandwidth
EP1361664A1 (fr) 2002-05-10 2003-11-12 Texas Instruments Incorporated Ldo regulateur avec un mode de sommeil

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060063555A1 (en) * 2004-09-23 2006-03-23 Matthew Robbins Device, system and method of pre-defined power regulation scheme
US20080003950A1 (en) * 2006-06-30 2008-01-03 Nokia Corporation Controlling switching mode power supply of power amplifier
US20080016379A1 (en) * 2006-07-13 2008-01-17 Nijhawam Vijay B System for Retaining Power Management Settings Across Sleep States
US7716504B2 (en) 2006-07-13 2010-05-11 Dell Products L.P. System for retaining power management settings across sleep states
US20080119226A1 (en) * 2006-11-21 2008-05-22 Samsung Electronics Co. Ltd. Apparatus for controlling power consumption in pda phone
US7865168B2 (en) * 2006-11-21 2011-01-04 Samsung Electronics Co., Ltd Apparatus for controlling power consumption in PDA phone
US8026703B1 (en) * 2006-12-08 2011-09-27 Cypress Semiconductor Corporation Voltage regulator and method having reduced wakeup-time and increased power efficiency
US8072196B1 (en) 2008-01-15 2011-12-06 National Semiconductor Corporation System and method for providing a dynamically configured low drop out regulator with zero quiescent current and fast transient response
US8258942B1 (en) 2008-01-24 2012-09-04 Cellular Tracking Technologies, LLC Lightweight portable tracking device
US20100079201A1 (en) * 2008-09-30 2010-04-01 Agneta Bengtsson Automated sleep sequence
US7777471B2 (en) * 2008-09-30 2010-08-17 Telefonaktiebolaget Lm Ericsson (Publ) Automated sleep sequence
WO2011075308A1 (fr) * 2009-12-18 2011-06-23 Trueposition, Inc. Récepteur de positionnement par satellite et système de localisation de serveur mandataire
US8199051B2 (en) 2009-12-18 2012-06-12 Trueposition, Inc. Satellite positioning receiver and proxy location system
US20110148699A1 (en) * 2009-12-18 2011-06-23 Trueposition, Inc. Satellite Positioning Receiver and Proxy Location System
US9354323B2 (en) 2009-12-18 2016-05-31 Trueposition, Inc. Satellite positioning receiver and proxy location system
US20130201735A1 (en) * 2010-09-03 2013-08-08 Hendon Semiconductors Pty Ltd Ac-dc converter with adaptive current supply minimising power consumption
US8891267B2 (en) * 2010-09-03 2014-11-18 Hendon Semiconductors Pty. Ltd. AC-DC converter with adaptive current supply minimising power consumption

Also Published As

Publication number Publication date
EP1361664A1 (fr) 2003-11-12
US20050143045A1 (en) 2005-06-30
EP1361664B1 (fr) 2008-08-06
US20030211870A1 (en) 2003-11-13
DE60228051D1 (de) 2008-09-18

Similar Documents

Publication Publication Date Title
US6973337B2 (en) Apparatus for the mobile communication device in low power consumption using LDO regulator with sleep mode
US10423176B2 (en) Low-dropout regulators
US6897715B2 (en) Multimode voltage regulator
US7812582B2 (en) System and method of power distribution control of an integrated circuit
US9263885B2 (en) Distributed power delivery scheme for on-die voltage scaling
US20070194771A1 (en) Power management unit for use in portable applications
US20030011247A1 (en) Power supply device
US8026703B1 (en) Voltage regulator and method having reduced wakeup-time and increased power efficiency
US20230229182A1 (en) Low-dropout regulator for low voltage applications
US20120326694A1 (en) Data retention secondary voltage regulator
USRE38891E1 (en) Programmable load transient compensator for reducing the transient response time to a load capable of operating at multiple power consumption levels
US7516339B2 (en) Low power electronic circuit incorporating real time clock
US20060255781A1 (en) Constant voltage power supply
US8159199B2 (en) On-chip voltage supply scheme with automatic transition into low-power mode of MSP430
US12189408B2 (en) Voltage regulator having minimal fluctuation in multiple operating modes
US6498467B1 (en) Ultra-low-power mode for a voltage regulator
JP2001014848A (ja) 回路装置、その動作方法
US9537392B1 (en) Circuits and methods for dynamic voltage management
US20210109554A1 (en) Simultaneous low quiescent current and high performance ldo using single input stage and multiple output stages
US6362605B1 (en) Method and apparatus for providing power to an integrated circuit
US7843183B2 (en) Real time clock (RTC) voltage regulator and method of regulating an RTC voltage
CN113867472A (zh) 用于向负载提供电压的电路、操作稳压器的方法和稳压器
WO2018000517A1 (fr) Circuit de gestion d'alimentation
CN109741771A (zh) 一种降低静态随机存取存储器功耗的系统及方法
CN211701852U (zh) 一种降压模块和移动终端

Legal Events

Date Code Title Description
AS Assignment

Owner name: TEXAS INSTRUMENTS INCORPORATED, TEXAS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:JIGUET, JEAN-CHRISTOPHE;INDIANI, LORENZO;REEL/FRAME:013235/0426

Effective date: 20020618

STCF Information on status: patent grant

Free format text: PATENTED CASE

FPAY Fee payment

Year of fee payment: 4

FPAY Fee payment

Year of fee payment: 8

FPAY Fee payment

Year of fee payment: 12